Speed-indicator and timing-instrument



(No Model.) 4 Sheets-Sheet 1.

E. G. DORGHESTER. SPEED INDICATOR AND TIMING INSTRUMENT.

No. 550,444. Patented Nov. 26, 1895.

INVENTOR [xx/M 444 4 4;

%% ATTORNEY (No Model.) 4 SheetsSheet 2.

E. G. DOROHESTER. SPEED INDICATOR AND TIMING INSTRUMENT. No. 550,444. Patented Nov. 26, 1895.

INVENTOR WITESSES: I,

' 44.45 ATTORNEY ANDREW E GRAHAMPHOTO-LITHO WASNINGYONDC (No Model.) 4 Sheets-Sheet 3.

E. G. DORGHESTER. SPEED INDICATOR AND TIMING INSTRUMENT.

No, 550,444. Patented Nov. 26, 1895.

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E. G. DOROHESTER. SPEED INDICATOR AND TIMING INSTRUMENT.

No. 550,444. r Patented Nov. 26, 1895. I

WITNESSES INVENTOR UNITED STATES PATENT OFFICE.

EDIVARD G. DOROHESTER, OF GENEVA, NEWV YORK.

SPEED-INDICATOR AND TlMlNG-INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 550,444, dated November 26, 1895.

Application filed April 1, 1895. Serial No. 543,940. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD G. DORCHES- TEE, of Geneva, in the county of Ontario, in the State of New York, have invented new and useful Improvements in Timing-Instruments, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the timing-instrument for which I have on the 23d day of February, 1895, filed an application for United States patent, Serial No. 530,368.

The object of my present invention is to simplify the mechanism of said instrument without impairing its efficiency; and to that end the invention consists in the improved construction and combination of parts, hereinafter described and specifically set forth in the claims.

In the annexed drawings, Figure 1 is a plan view of the timing-instrument. Fig. 2 is an inverted plan view of the top plate or diaphragm with the indicator-gearings mounted thereon, portions being broken away to better illustrate the arrangement of said gears. Fig. 3 is a face view of the mechanism at the base of the instrument. Fig. 4 is a horizontal transverse section on line X X in Fig. 5. Fig. 5 is a vertical transverse section on line Y Y in Fig. 3, viewed in the direction of the arrow. Fig. 6 is an enlarged transverse section of the cone of gears and cooperating wheels mounted on the same shaft, showing the same with feathers formed thereonv and entering a groove in the shaft. Figs. 7 and 8 are transverse sections, respectively, on lines Z Z and O O in Fig. 5; and Fig. 9 illustrates the means for transmitting motion to the indicator-gears.

Similar letters and numerals of reference indicate corresponding parts.

A denotes the case which incloses the timing mechanism. Said case is to be fastened to the frame of a bicycle or other vehicle and placed in such a position as to permit said timing mechanism to be actuated by the motion of the wheel of the vehicle. An exemplification of said attachment is shown in my prior application for patent, hereinbefore referred to. The interior of the case is provided with diaphragms 1 2 3 4, to which the mechanism is secured. From the interior of the lower portion of the case extends a shaft Z), which is journaled in suitable bearings fixed to the case and has fastened to its outer end a star-wheel c, which by contact with a suitable projection on the wheel of the vehicle during the travel thereof receives intermittent rotary motion. The inner end of the shaft Z) is provided with a wormgear 61, which meshes with a pinion cl, mounted on a studpin fastened to the diaphragm 1. Said pinion meshes with a gear-wheel e, fastened to a shaft 6, which is j ournaled in the diaphrams 1 and 2, as shown in Figs. 5 and 6 of the drawings. Between the diaphragms 1 and 2 is a cone of gears ora series of gears f of successively-increasing diameters fastened to the shaft 6. Parallel with this shaft is another shaft h, passing through the diaphragm 2 and pivoted to the diaphragms 1 and 3. To this latter shaft are firmly secured the gears g and g, of different diameters and preferably formed in one piece. On the same shaft is pivoted the yoke P, which is formed with a bar P, parallel with the shaft h. Said yoke is thus pivoted eccentric to the gears f.

011 the bar P is pivoted an arm R, to one end of which is pivoted a gear-wheel h, which can be made to engage any desired-size gear of the series f and simultaneously with one of the gears g g by turning the yoke on the shaft h and swinging the arm R on the yoke and shifting said arm vertically on the bar P of the yoke, as more clearly shown in Fig. 4 of the drawings. By said shifting of the gearwheel 71, the speed of the motion transmitted from the shaft 6 to the shaft h is varied, as may be desired.

To the portion of the shaft 7L between the diaphragms 2 and 3 is fastened the ratchetwheel n, and over this wheel is the spur-wheel o, mounted loosely on said shaft. This latter wheel receives intermittent motion from the ratchet-wheel n by means of spring-pawls 0", attached to the wheel 0 and engaging said ratchet-wheel.

t and to represent two pointers designed to be timed, respectively, with the second-hand and minute-hand of the chronometer D, and are attached, respectively, to two annular gears 15 and a, mounted revolubly in an annular rabbet t in the diaphragm 4, which is provided with a circular opening directly over and concentric to the dial of the chronometer D, seated between the diaphragms 3 and 4. The gear 15, which carries the pointer i, re ceives motion by means of pinions t' and 2', attached to a vertical shaft j and meshing, respectively, with the gears and t, as shown in Fig. 9 of the drawings. The other annular gear u, which carries the pointer 10, is caused to make one revolution during sixty revolutions of the gear 15. This reduced motion is obtained by a lug Z on the gear 25, engaging a star-wheel l, attached to a shaft, which has also secured to it a pinion l, meshing with the annular gear a, as shown in Figs. 1 and 2 of the drawings.

The mechanisms thus far described are adjusted by the shifting of the gear-wheel h, in the manner hereinbefore described, to move the pointers t and u in unison with the second and minute hands of the chronometer D at a predetermined speed of the motion of the vehicle, and any deviations between said pointers and hands apprises the rider of the vehicle if he is traveling at the desired speed.

In order to further graduate the transmission of motion to the indicators t and u, I employ mechanism which is to a great extent similar to that described in my prior application forLetters Patent, hereinbefore mentioned 210. ,to the hub of the ratchet-wheel nis pivoted the segment 0, which is concentric to the shaft h, and has connected to it spring-pawls r r, engaging the teeth of the ratchet-rim 0, which is attached to or integral with the wheel 0, as shown in Figs. 5 and 8 of the drawings. The teeth of said rim are pitched in opposite direction of the teeth of the ratchet-wheel a, allows the wheel 0 to be turned independently of the wheel n by the pawls r of the segment 0, when the latter is swung to its position of rest by force of the spring 0. To the wheel 6 is fastened the circular plate 10, which is concentric to said wheel and has rigid teeth 11 projecting from its periphery, preferably fifteen in number. In the spaces between the teeth are fingers 12, pivoted to the wheel 6 in such a manner as to allow each of said fingers to be turned on its pivot, so as to either lie completely within the space between the teeth or to project with its free end beyond the outer end of the adjacent tooth, on which it then rests, and is thus supported, as shown in Fig. 3 of the drawings. Springs 1) o serve to retain the fingers in. their adjusted positions.

The tumbler 15 is pivoted to the diaphragm 1 and has aflixed to its heel the spur 6, against which rests the pin 7, attached to the segment 0, which latter is forced in said direction by the spring 0, hereinbefore mentioned. The pressure of the pin 7 against the spur 6forces the tumbler toward the teeth of the plate 10, so as to cause the latter to strike the tumbler and thereby impart an oscillatory motion to the same during the rotation of the wheel 0. Said oscillations are transmitted to the segment 0 by the engagement of the spur 6 with my aforesaid prior application. provided with steps or notches X, which are the pin 7 and by the aid of the spring C. The oscillations of the segment cause the wheel 0 to receive impulses in addition to those imparted to it by the pawls of the ratchet-wheel n, the oscillations of the segment being transmitted to the wheel 0 by the engagement of the pawls rwith the ratchet-rim 0 on said wheels, as hereinbefore described.

The mechanism for transmitting motion from the Wheel of the vehicle to the wheel a is so timed as to cause the latter wheel to make three revolutions during the travel of a mile by the vehicle. Hence the engagement of the tumbler 15 with the fifteen teeth of the plate causes the segment 0 to receive forty-five impulses during the travel of a mile by the vehicle, each of said impulses representing one second or fractions of a second of time, according to the degree of vibration imparted to the tumbler.

To allow the tumbler to be adjusted to receive fewer impulses or impulses of different degrees during the rotation of the wheel 6-, I employ the latch 8, similar to that shown in This latch is different distances from the pivot of the latch and are adapted to engage the heel of the tumbler and sustain the same in different angles, so as to either lie to a greater or less degree in the path of the teeth of the plate 10,

or completely out of said path. When in the latter position, one or more of the fingers 12 can be turned to project from the adjacent tooth 11 and come in contact with the tumbler, so as to impart one or more impulses thereto during the rotation of the wheel e. In this manner the transmission of motion to the pointers t and a can be further graduated, as may be desired.

The latch 8 is sustained in its various adjusted positions by the eccentric 9, pivoted to the diaphragm 2, on which eccentric the latch is made to rest by force of the spring 5.

What I claim as my invention is 1. In combination with the wheel e actuated by the machine or vehicle to be timed, the cone of gears -f rotating with said wheel, the yoke -P pivoted eccentric to said cone, the gear-wheels -g-- and g"- fixed to the axis of the yoke, the arm --R pivoted to the yoke, the gear-wheel -h pivoted to said arm and adapted to mesh with the gears f and g-g, and the revoluble time indicators t and ureceiving motion from the wheels --gand 'g-- by intervening mechanisms as set forth.

2. In combination with the wheel -e actuated by the machine or vehicle to be timed, the cone of gears fixed to the shaft of said wheel, the shaft h parallel to the axis of said cone, the gears g-g and ratchet-wheel -n fastened to said shaft, the yoke -P and wheel 0-- mounted loosely on said shaft, the arm R pivoted to and movable vertically on the yoke, the gear h pivoted to said arm and adapted to engage plate 10 provided With fixed teeth -11,

and the fingers -12- pivoted in the spaces I 5 between the teeth and movable from said spaces to a projecting position beyond the teeth as set forth.

In testimony whereof I have hereunto signed my name this 28th day of February, 20

EDWARD G. DOROHESTER. [1 s] Witnesses:

J. J. LAASS, O. L. BENDIXON. 

